This has been happening for some time with v7.x. After opening Logos to my modest layout (below) and clicking the ESV tab there is a delay, Logos becomes non-responding and when it finally opens it has swapped places with BKC.
1362.ESV slow response.zip

Visual filters:
- Addressee
- Corr Selection
- Emph Active Lemma
- Speaker Labels
- 1x Note file (small)
- 1x Basic search VF on Translator's Note field