meek PT stops functioning after long uptime

Running TorBrowser on macOS with meek PT fails after long uptime.

Scenarios:

1. Run machine for a day or more, then try to open torbrowser and connect, and it fails.

2. Boot machine, use torbrowser successfully for a period, quit and then leave machine running for an extended period (a day at least) and then try to reopen torbrowser and connect -> fails to connect.

Interestingly, and for unknown reasons, adding the log options to meek-client and meek-client-torbrowser in torrc avoids this bug. Any thoughts?