JHCCoffee I guess it depends on how hard your base water is & the impact that has on the filter if left standing.
With my water; If going to be away for a few weeks I’ll empty the jug, give it a wash & wrap the filter with cling film. I’ll flush it through when I get back then test it.
If it tests, smells & tastes OK I’ll crack on using the same filter. I’ve had times when I’ve been away for 6 weeks & haven’t observed any impact on the filters performance