sometimes if I clear the cache in the backend (RL cache-cleaner)
and then open the homepage of the J4 site
several (2 or 3) modals are popped up and overlay each other,
I have to close all modals (one after another) to see the homepage content again.

see this screen video:


I have this seen very often when we were evaluating all the modals J4 beta versions the last days,
I didn't pay much attention, I thought this happens when I "overinstall" the modals extension with a newer version..

But now I installed a different extension (not from JL), and after the istallation is finished RL cache-cleaner does its job and cleans the cache,
and voilà: the same issue again on the homepage (see video)

To be honest I can not reproduce it,
I think that it occurs often after installing an extension,
but I can not verify or reproduce it.
(I am even not sure that it has to do with RL cache cleaner at all)

I think (do not know) the problem remains as long as the joomla cache time lasts (now: 15min / conventional cache),
so I will increase the cache time to 2 hours or so,
and try to trigger the error again,
so maybe you can see it "live" and not from the video only ....

really ?
I didn't do anything in the meantime 😉
I was neither in the frontend nor in the backend the last hour ...


What if all modal links are (for whatever reasons) written with the open="true" attribute into the cache ?
would that explain it ?

yes you are right ...

...very strange

5 month later:
unfortunately this is still an issue to me ...
I am in a big update from J3 to j4, everything works fine so far,
I solved every problems / workarounds,
but this is the last remaining error (that prevents me from going live)
and I have no idea what to do...

During the whole migration phase (3 weeks), with all the template work and all the extensions uninstall and reinstall / upgrade again,
and always celaning the cache etc... ,
I have surely faced this error more than 10 times (!)

Today in the morning I finally wanted to go live,
but on the first visit of the start page I saw this error again:
all modals from that page pops up (by themselves) at the same time
The problem remains until the joomla cache time is over, or until I trigger the cache cleaner in the backend..
(the page is not usable for a visitor during that time)

you once saw that error by yourselfso you know what I am describing here,
but I am still not able to trigger that faulty behavior.

what would you do in my place now ?

5 month ago I demonstated the error on a completely "vanilla" J4 installation (maybe you remember?)
(no template and the only (non-core) extensions were cachecleaner and modals)

Since we both obviously do not know what to do,
I implemented a "brute force" method now:
since the rereplacer plugin is placed in execution order after the modals plugin,
I implemeted a rule in rereplacer to delete unwanted-tags within the generated html..

in my case:
• data-modals-open="true" -tags are unwanted on modals with images,
• data-modals-open="true" -tags are wanted on content Modals

so the rereplacer rule is quite simple:
this rereplacer rule fires only if the modals plugin unintentionally* generates a data-modals-open="true" -tag on a modal image.
*(without having set the open="true" parameter within the {modal} tag of an image in the article editor (what I never did))

I think we really don't know if the reason for this error is
that the modals plugin unintentionally* creates a data-modals-open="true" tag in the generated html-output,
but if the error does not appear from now on, there is a chance.