Timeline page type weird behaviour

I've been having issues with the Timeline page type.
Issue 1: I CANNOT have text ONLY items ANYWHERE in the timeline, when I do this, it tells me either "image not found" or "ERROR: TypeError: null is not an object (evaluating t.url.match). I've tested this. as soon as I remove the text only item, it works.

Issue 2: so I've opted to use Image items. this works. BUT, it only allows me to add 12 items! (12 events!). Surely this is a bug? When I try to add the 13th item, a dialogue pops up and told me that I can only add 12 images.

Anyone knows a solution please help!
Our school's Xerte is version v.3.10.5.
I'm NOT a developer, but rather an user from my school so I don't have any access to the installation end of things. But am still asking the question here in case it's something I can fix on my (user) end. thank you!

As far as I know there is no limitation for the number of items.

I don't have a 3.10 installatio that I can quickly try.

The text-only events have been added to this page in version 3.11 and I did successfully add 14 events.

ahhh, I see so this bug has been fixed in the updated version. Alas my school won't be updating any time soon
thank you for letting me know though!