iwm: loosing connection to AP very often

Hello. I observe a very negative and unpleasant development and behaviour with Intel iwm driver in FreeBSD recently. Using this WiFi adapter in a Lenovo E540 (technical specs see below, output of pciconf -lvbc), this adapter ran stable with FreeBSD 12-CURRENT some time ago, until I moved to 13-

Problem reports for wireless@FreeBSD.org that need special attention

To view an individual PR, use: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=(Bug Id). The following is a listing of current problems submitted by FreeBSD users, which need special attention. These represent problem reports covering all versions including experimental development code and ob