I can confirm it. All tracking issues in pre5 seem related to the problems above.
In case one wants to reduce memory consumption a bit more we could tighten the eta cuts to 3.0, but the current cuts (5.0) are needed for the extended forward pixels geometry as well. One possibility would be to add this to customization functions. However, it should be proven that the impact makes a difference and then fully tested. FYI @rovere