a odd thing; Maybe one of you have an Idea.

I have a Site with 40 UAP-AC-Pro, the site was recabled 2 Years ago (CAT6) everything fine.
Some Access Points (random) after running some days they show “100 FDX” in the Status, switch CLI confirm 100M FD; If I reboot it its back to 1G. Tested on one port with a Network Tester and the tester confirm 1000M FD I also get ~900 on Iperf so I have no real Idea what causing this.

Switches used are Aruba 2530- PoE+

My guess would be switch firmware issue.

Defenitly a weird issue. Another site running similar setup is totally fine. But I will give it a try if I can locate a specific switch.