Every so often (2 - 3 days) Forum Topics that I have collapsed (Not Interested) expand back to default view. ( I have seen the post re Browser Cookie Setting etc.)
Today , Launching my everyday B4X Forums shortcut, I witnessed the browser briefly informing "This web page could not be reached ... " *** Or something similar.
2 seconds later the page loaded and collapsed forum topics had returned to default view (Expanded) ... Coincidence maybe ?
Opera Desktop
Version: 65.0.3467.78
edit: There has been no attempt to clear history / cookies etc.
Made some research about this feature. The state is saved in the browser "local storage". It should be kept for quite long. It will be reset when you clear the cookies.
The expiration date is not configurable.
@DonManfred .. certainly to early to tell , I cleared all browser cookies / other site data .. yesterday, on a hunch of old forum settings causing the issue.
As I said still early but have a feeling this will solve the issue .... Time will tell .
Unfortunately have to leave home for a fortnights work .... so the desktop will remain dormant and I cannot confirm success or not.