Seen on UHKv1, when switching to new key map, using a modifier key to access map switch on some other layer, some times the layer access key is kept seen as pressed even when the key is let go.

On my setup, I access new key maps via the Fn layer and 1/2/3... to access new key maps. Some of these maps are not very evolved and do not even have layers, but all have an "escape" button to return to the default keymap.

Sometimes when switching to new key map, the Fn layer remains activated, and since it is not present on most maps, there is no escape from that and a cold restart of keyboard is needed. I've fixed so that escape key is present on most layers of the alt keymaps, but it is still annoying that Fn activation still remains sometimes. Unclear when and why.

Data from Agent:
Right keyboard half firmware: UltimateHackingKeyboard/firmware: 12.2.0
Left keyboard half firmware: UltimateHackingKeyboard/firmware: 12.2.0
Key cluster firmware: UltimateHackingKeyboard/firmware: 12.2.0