(also to @Arnoud_Fleer) This indicates app problems.
Possibly it’s the IPv6 bug:
If Homey firmware is lower than v12.4.5, update firmware;
(the description is not complete: or when installed apps disappear should be included).
if it’s v12.4.5 or up:
disable IPv6 on on your router and see if this fixes the issues.
If true: please do report to homey.app/support the IPv6 bug is not resolved
