Hi
Welcome to BuddyDev.

Even though it is not feasible to reload and refresh at the same time(It is by using pagination but not recommended), There is a solution.
I had a look at MathJAX api. The MathJAX provides a way to apply it on dynamically loaded content. So, that will resolve your issue.

To help you with that, I will need the following

1. Which version of MathJAX are you using(1.x or 2.x )
2. Are you using any custom theme? If yes, which one?
3. Which template pack(Nouveau or Legacy) are you using.

Please let me know and I will assist.

Regards
Brajesh

Hi,
My apologies for the delayed reply. I had to install OcenWp to see if the include custom js for BuddyPress or not.

Please copy the plugins/buddypress/bp-templates/bp-legacy/buddypress/js/buddypress.js to your theme/buddyoress/js/buddypress.js and look for the code which looks like this

		/* Load more updates at the end of the page */
		if ( target.parent().hasClass('load-more') ) {
			if ( bp_ajax_request ) {
				bp_ajax_request.abort();
			}

			jq('#buddypress li.load-more').addClass('loading');

			oldest_page = activity_oldestpage + 1;
			just_posted = [];

			jq('.activity-list li.just-posted').each( function(){
				just_posted.push( jq(this).attr('id').replace( 'activity-','' ) );
			});

			load_more_args = {
				action: 'activity_get_older_updates',
				'cookie': bp_get_cookies(),
				'page': oldest_page,
				'exclude_just_posted': just_posted.join(',')
			};

			load_more_search = bp_get_querystring('s');

			if ( load_more_search ) {
				load_more_args.search_terms = load_more_search;
			}

			bp_ajax_request = jq.post( ajaxurl, load_more_args,
			function(response)
			{
				jq('#buddypress li.load-more').removeClass('loading');
				activity_oldestpage = oldest_page;
				jq('#buddypress ul.activity-list').append(response.contents);

				target.parent().hide();
			}, 'json' );

			return false;
		}

It is around line 431, we need to add 1 line

MathJax.typeset();

as shown below.

		/* Load more updates at the end of the page */
		if ( target.parent().hasClass('load-more') ) {
			if ( bp_ajax_request ) {
				bp_ajax_request.abort();
			}

			jq('#buddypress li.load-more').addClass('loading');

			oldest_page = activity_oldestpage + 1;
			just_posted = [];

			jq('.activity-list li.just-posted').each( function(){
				just_posted.push( jq(this).attr('id').replace( 'activity-','' ) );
			});

			load_more_args = {
				action: 'activity_get_older_updates',
				'cookie': bp_get_cookies(),
				'page': oldest_page,
				'exclude_just_posted': just_posted.join(',')
			};

			load_more_search = bp_get_querystring('s');

			if ( load_more_search ) {
				load_more_args.search_terms = load_more_search;
			}

			bp_ajax_request = jq.post( ajaxurl, load_more_args,
			function(response)
			{
				jq('#buddypress li.load-more').removeClass('loading');
				activity_oldestpage = oldest_page;
				jq('#buddypress ul.activity-list').append(response.contents);

				target.parent().hide();
                               // New line added. 
                               MathJax.typeset();
			}, 'json' );

			return false;
		}

You will need to rename the file to buddypress.min.js (or you can minify and name the new file as this) and BuddyPress will load it.

All we are doing is folllowing the re-initialization for MatchJAX as specified here
https://docs.mathjax.org/en/latest/web/typeset.html#resetting-automatic-equation-numbering

That should take care of it.

Regards
Brajesh

Hi Nestor,
You are welcome.

I am not sure what “Select activities” is. Also, I do not use BP Edit Activity, so I regret my inability to assit with these 2.

I will help with the comments though.

Please look for a section

			jq.post( ajaxurl, ajaxdata, function(response) {
				target.removeClass('loading');
				content.removeClass('loading');

				/* Check for errors and append if found. */
				if ( response[0] + response[1] === '-1' ) {
					form.append( jq( response.substr( 2, response.length ) ).hide().fadeIn( 200 ) );
				} else {
					var activity_comments = form.parent();
					form.fadeOut( 200, function() {
						if ( 0 === activity_comments.children('ul').length ) {
							if ( activity_comments.hasClass('activity-comments') ) {
								activity_comments.prepend('<ul></ul>');
							} else {
								activity_comments.append('<ul></ul>');
							}
						}

						/* Preceding whitespace breaks output with jQuery 1.9.0 */
						var the_comment = jq.trim( response );

						activity_comments.children('ul').append( jq( the_comment ).hide().fadeIn( 200 ) );
						form.children('textarea').val('');
						activity_comments.parent().addClass('has-comments');
					} );
					jq( '#' + form.attr('id') + ' textarea').val('');

					/* Increase the "Reply (X)" button count */
					new_count = Number( jq('#activity-' + form_id[2] + ' a.acomment-reply span').html() ) + 1;
					jq('#activity-' + form_id[2] + ' a.acomment-reply span').html( new_count );

					// Increment the 'Show all x comments' string, if present
					show_all_a = activity_comments.parents('.activity-comments').find('.show-all a');
					if ( show_all_a ) {
						show_all_a.html( BP_DTheme.show_x_comments.replace( '%d', new_count ) );
					}
				}

				jq(target).prop('disabled', false);
				jq(content).prop('disabled', false);
			});

It starts around line 625

and you can add that line just below “jq(content).prop(‘disabled’, false);” like

jq(content).prop('disabled', false);
MathJax.typeset();

Regards
Brajesh

Hi Nestor,
In that case, add atime delay before applying the MathJax.typeset();

That should most probably fix it.

something like this

setTimeout(function() {
 MathJax.typeset();
}, 300);

I believe the dom insertion might be the case, so delaying the running of MathJax.typeset() might fix it.

For activity tabs, you should look for this function ‘bp_activity_request’

As of BP Edit activity, It is a 3rd party plugin that works with BuddyPress. We offer limited support for BuddyPress here. We do not offer support for other 3rd party plugins.

Regards
Brajesh

Hi Nestor,
You are welcome.

I am glad I was able to assist.

Best Regards
Brajesh