Problem between 2 OPNSense on same Network

[c-mu]

Hi,
given
Host A: 10.27.200.50
Host B: 10.27.200.30

Telnet Host A to B Port 443: works
Telnet Host B to A Port 443: no luck

Both Server has a rule, that the 10.27.200.0/24 has allowed Access to "this Firewall".
Both Server has an open Port 443 and at the interface, the "Block Private Addresses" Box is UNCHECKED.
Both are on the same Software Version: 19.7.8
Both Server can ping each other.

A made a Screenshot with tcpdump output.
First try (source Port 7777) (works) is Host A to B
Second Try (source Port 8888) ist Host B to A

Any Ideas?
Thank you!

[c-mu]

One more thing:

While Host A is telneting Host B, I see activity on both firewall log live views.
While Host B is telneting Host A, I only see activity on Host B's live view.