Thank you for your response.
I found a workaround for this issue, I capped the mss of packets to/from webgui via IPsec at the minimal size which made the transmissions more reliable and the webgui operable via IPsec.
I found a workaround for this issue, I capped the mss of packets to/from webgui via IPsec at the minimal size which made the transmissions more reliable and the webgui operable via IPsec.