PCIe Bus Error

Hello, when I'm trying to capture stills using samples from SDK (and own application derived from them) via DeckLink Mini Recorder, I'm experiencing high CPU load by systemd-journald which I've traced to these messages in syslog:

kernel: [106908.093346] pcieport 0000:00:1c.6: AER: Multiple Corrected error received: id=00e6
kernel: [106908.093361] pcieport 0000:00:1c.6: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e6(Transmitter ID)
kernel: [106908.093366] pcieport 0000:00:1c.6: device [8086:a296] error status/mask=00001000/00002000
kernel: [106908.093369] pcieport 0000:00:1c.6: [12] Replay Timer Timeout
kernel: [106908.095755] pcieport 0000:00:1c.6: AER: Corrected error received: id=00e6
kernel: [106908.095763] pcieport 0000:00:1c.6: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e6(Transmitter ID)
kernel: [106908.095769] pcieport 0000:00:1c.6: device [8086:a296] error status/mask=00001000/00002000
kernel: [106908.095773] pcieport 0000:00:1c.6: [12] Replay Timer Timeout
kernel: [106908.095782] pcieport 0000:00:1c.6: AER: Corrected error received: id=00e6
kernel: [106908.095790] pcieport 0000:00:1c.6: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e6(Transmitter ID)
kernel: [106908.095793] pcieport 0000:00:1c.6: device [8086:a296] error status/mask=00001000/00002000
kernel: [106908.095796] pcieport 0000:00:1c.6: [12] Replay Timer Timeout

(repeating every few milliseconds)

Has anyone encountered this behaviour? I've found few reports (with different HW) that suggest I should swap PCIe slot or update BIOS. Or maybe kernel is not supported? Thanks in advance.

System info:
Ubuntu 18.04.2 LTS
Intel® Core™ i5-7500 CPU @ 3.40GHz
Intel® HD Graphics 630
4.15.0-46-generic #49-Ubuntu SMP Wed Feb 6 09:33:07 UTC 2019
DeckLink Mini Recorder (SDI input)