Not sure if this helps, but I see this on error.log:
2020-02-14 13:13:06.453310 [WARN] End QUIC busy loop at 1151
2020-02-14 13:20:12.305794 [WARN] Detected QUIC busy loop at 100
2020-02-14 13:20:14.185309 [WARN] Detected QUIC busy loop at 200
2020-02-14 13:20:16.084298 [WARN] Detected QUIC...