Problems with multicast IPTV streams after upgrade to 2.4.3-RELEASE-p1

[scream88]

Hi together

I upgraded my pfSense installation (on VMWare ESX) to 2.4.3-RELEASE-p1 some days ago.
Before my instance run more then 50 days without reboot or issues.

Yesterday I noticed, that my IPTV streams didn't work right now. After a longer research with the video player, ESX, Switch & Router I rebooted all my stuff an it comes to work again...
after only a few hours it was broken agian. (Video stop playing after about 1 minute)

Today I relized, that reboot the pfSense seems to resolve the problem temporary.
Only restart "igmpproxy" in services tab didn't help. So... any idea how I can get more useful log to help solve this problem?

I didn't change something in config of my pfsense (rules, igmpproxy, interfaces or something other).

Edit: now, after 38 minutes of uptime it happens again :(