Repro in a freshly installed Sublime (Win7 64bit, build 2218 nightly):

1. Create file that doesn’t require scrolling:

echo "short string" > testfile

2. Open file in Sublime

3. Edit and save the file from another program such that it has enough lines to require scrolling, or:

cat /usr/share/dict/words > testfile

4. Click the view in Sublime to update the buffer contents.

]The minimap disappears until a second click/]
]Even after the minimap reappears, middle-mouse scolling is disabled/]

5. Click the gray area of the minimap and drag down.

]Middle-mouse scrolling functionality is restored/]

Likely related issue in Vintage:

1. Create a file:

echo "short string" > testfile

2. Open the file in Sublime

3. Enter Command Mode:

4. Modify the file outside of Sublime:

echo "short string 2" > testfile

5. Click the view in Sublime to update the buffer contents. Begin typing: “arstdhneio…”

]The cursor is in command mode style (“underscore”), but in insert mode state/]