@AlexandK #welcome to the forum.
Since you are new here I assume you don’t know the #rebootsguide yet? Click the blue link to find lots of tips for fixing reboots.
Since this topic was quiet for 3 months I’ll now close it and redirect to the general topic about reboots: FP2 random reboots - see #rebootsguide for help
Please continue there if you have further questions.
Okay since this topic is about specific reboots caused by wifi networks and it’s even linked to from the rebootsguide I reopened it and changed the title to something more descriptive.