Plugin available updates not being displayed and updates not possible via admin console menu

[Ian Helliwell]

since updating to 5.8, available plugin updates are briefly displayed as a red number against the updates and plugin menus. However, the updates page shows all plugins, themes and translations are up to date - which they clearly aren't.
See ​https://wordpress.org/support/topic/cant-update-plugins-since-5-8-upgrade/

[audrasjb]

Hello and welcome to WordPress Core Trac,

So to summarize and clarify the issue, the wp-admin/update-core.php page shows that all your plugins are up to date, and they aren't?

[Ian Helliwell]

Correct. But worse still, I cannot upgrade plugins either via the updates menu or via the plugins page as they are all shown as up-to-date.

Thanks, Ian

[audrasjb]

How do you know they are not up-to-date?
Could you please share some screenshots of the issue?
I can't reproduce it on a fresh install.

[Ian Helliwell]

Sure:
I have attached:

1. A screen shot of the admin console shwing the updates page which I forced a re-check before the screen shot.
2. A screen shot of the 10Web console which shows available updates for a number of plugins - specifically Quttera Malware Scanner and Really Simple SSL.
3. A screen shot of the plugins page showing those two plugins and version numbers.

Notably, I have not had any "updates available" via the update page since upgrading to 5.8 a week ago which is unprecedented.

[Ian Helliwell]

I managed by chance to capture the brief red updates available on my test site (I don't run 10web console on that site). See attachements 4 & 5

[audrasjb]

Thank you! I'll try to reproduce the issue on a fresh install.

[Ian Helliwell]

For info, I deactivated the caching plugin (WP-Optimize) and refreshed everything just in case but no difference.

[artsgirl]

I am experiencing this exact same behavior, across multiple sites that I manage for clients and myself. I haven't yet been able to identify a consistency across the sites, as they all have different combos of plugins. The only consistency seems to be WordPress. I can probably provide additional information/screenshots if necessary for troubleshooting.

[JimGoodrich]

I have also been having this issue and have a couple of staging sites currently with the issue.

Additionally, the Automatic Updates are inaccessible to either enable or disable. See Screenshot at:

​https://www.screencast.com/t/KqQjy4PDi

If it would help, I am willing to create a login for Trac to see this issue live.

Let me know.

[Ian Helliwell]

Maybe too early to tell, but I appear to be able to update the plugins as normal again. I'll post again in a couple of days if the problem has completely gone away.

[Ian Helliwell]

Hooray! The problem appears to have gone away now for my two sites (I hope it has for everybody). I can only guess it was plugin/theme related and an recent update has fixed it.

The change in behaviour was noted after a number of plugin updates were applied via a third-party dashboard (the only way I could do updates) - plus the first theme update since the problem started (I use Poseidon).

Other than that, I cannot point to any other solution.