Looking at that log, the trigger occurred at 09:36 and the email action ran at 14:09. That’s a delay in the processing on the IFTTT servers and so should be reported to them.
As a next step I would see if I could reproduce an unreasonable delay. If it is just a one off, I would not report it and chalk it up to a temporary glitch. But, I would keep a note of this occurrence. If I could reproduce it a second time, I would report it.
At the bottom of their web site is a help link. Select that then select “Leave us a Message”. Send them details including the screenshots of any delays, a link to the applet (that should give them the internal ID), your account plan level (free/pro/pro+), your observations and your expectations about what a reasonable delay might be.