Random DNS Timeouts i'm unable to find out why

[uzurka]

Hello Opnsense forum !
I discovered a weird issue with my Opnsense
So, Opnsense is installed on a PC Engines APU2 (AMD GX-412TC SOC 4C, 1G RAM), with the following additionnal plugins :
- Adguardhome
- Crowdsec

Here's my issue:

I have random DNS timeouts. Which leads to some webpage unable to load and a browser experience degraded
I first thought it was due to my DNS setup (AdguardHome:53 + Unbound:5353 both on Opnsense) so i removed Unbound. Still those random timeouts. So I made adguardhome installed on another Device (rpi) and… still those randoms timeouts which is weird… I can’t see anything blocked in firewall logs (filered on udp53)
Have you any idea on how I could debug that?

Thanks ^^

[uzurka]

I got it. I Opened UDP only 53 from Interface to Opnsense... Opened TCP 53 too solved the issue...