tmpfs (/tmp) is just files stored in RAM, the system will not recognise tmp as something that can be safely dropped to swap or cleared especially if it was recently used, it thinks its required.
solseek is a bash script so it cannot do proper memory allocation / management. I assume its using tmpfs to avoid doing costly (time) tasks repeatedly when it can just re-use the data from its first usage leading to the app feeling more responsive.
Data put in tmp will not automatically get cleared when the process that created it is closed, the app needs to clean up after itself.
So no a re-log will not clear it but a reboot will purely because RAM is volatile and a reboot will momentarily cut power to the RAM flushing its contents.
