Coupures régulières du tunnel XTUN0

Bonjour,
Mon Overthebox (overthebox.892b2ad5-566b-4be5-918f-bddbe424c332) rencontre des coupures régulières du tunnel XTUN0 depuis quelques temps.
Lorsque le tunnel XTUN0 est coupé les ping vers internet fonctionnent, lorsque le tunnel monte, les pings ne passent plus.

Les logs lors des coupures sont les suivants :

Thu Nov 28 11:52:59 2019 daemon.err otb-tracker[9557]: curl: (28) Connection timed out after 8000 milliseconds
Thu Nov 28 11:53:07 2019 daemon.err otb-tracker[9557]: curl: (28) Operation timed out after 8001 milliseconds with 0 bytes received
Thu Nov 28 11:53:07 2019 user.notice post-tracking-otb-autoroute: add rule matching 0x7874756e using table 101 and pref 30000
Thu Nov 28 11:53:07 2019 user.notice post-tracking-store-state: xtun0 tracking status changed to OK
Thu Nov 28 11:53:40 2019 user.notice post-tracking-otb-autoroute: del rule matching 0x7874756e using table 101 and pref 30000
Thu Nov 28 11:53:40 2019 user.notice post-tracking-store-state: xtun0 tracking status changed to ERROR
Thu Nov 28 11:53:57 2019 daemon.err otb-tracker[9557]: curl: (28) Connection timed out after 8000 milliseconds
Thu Nov 28 11:54:05 2019 daemon.err otb-tracker[9557]: curl: (28) Operation timed out after 8001 milliseconds with 0 bytes received
Thu Nov 28 11:54:05 2019 user.notice post-tracking-otb-autoroute: add rule matching 0x7874756e using table 101 and pref 30000
Thu Nov 28 11:54:05 2019 user.notice post-tracking-store-state: xtun0 tracking status changed to OK
Thu Nov 28 11:55:11 2019 user.notice post-tracking-otb-autoroute: del rule matching 0x7874756e using table 101 and pref 30000
Thu Nov 28 11:55:11 2019 user.notice post-tracking-store-state: xtun0 tracking status changed to ERROR

Merci de votre aide.