Solis S5-GR1P10K resets Export Limit setting back to zero

[solaruser61]

Hi all, my Solis S5-GR1P10K inverter resets its Export Limit setting back to zero almost every day. There are no Alarm or Warning messages. Below are the other settings:

• Advanced Settings > Internal EPM Set > Soft Hard Lmt set > 5000W
• Advanced Settings > Internal EPM Set > Mode Select > Meter in Grid
• Advanced Settings > Internal EPM Set > Fail Safe > ON
• 24h ON

Each day, I need to manually adjust the Soft Hard Limit back to 5000W to enable power export to the grid, but by the next morning, it has reverted to zero. Any ideas what can cause it?