Map-Matching issues

[hbruch]

As I want to match bike trips I used sharedstreets-builder to generate custom tiles including road class 8 (Other).

When map-matching my CSV, at a couple of locations the matcher does not snap to the expected road:

What might cause this and how could I proceed to further analyze this issue?
Is there any documentation I overlooked, which elaborates the matching and gives some troubleshooting hints?

My event data in CSV format:

1,2019-04-09T08:52:08Z,48.8426550,9.6716190,,,
1,2019-04-09T08:52:09Z,48.8426360,9.6714560,,,
1,2019-04-09T08:52:10Z,48.8426250,9.6712910,,,
1,2019-04-09T08:52:11Z,48.8426130,9.6711270,,,
1,2019-04-09T08:52:12Z,48.8425980,9.6709630,,,
1,2019-04-09T08:52:13Z,48.8425900,9.6707970,,,
1,2019-04-09T08:52:14Z,48.8425800,9.6706330,,,
1,2019-04-09T08:52:15Z,48.8425700,9.6704670,,,
1,2019-04-09T08:52:16Z,48.8425640,9.6703020,,,
1,2019-04-09T08:52:17Z,48.8425560,9.6701380,,,
1,2019-04-09T08:52:18Z,48.8425520,9.6699740,,,
1,2019-04-09T08:52:19Z,48.8425500,9.6698110,,,
1,2019-04-09T08:52:20Z,48.8425400,9.6696450,,,
1,2019-04-09T08:52:21Z,48.8425370,9.6694810,,,
1,2019-04-09T08:52:22Z,48.8425330,9.6693170,,,
1,2019-04-09T08:52:23Z,48.8425330,9.6691520,,,
1,2019-04-09T08:52:24Z,48.8425370,9.6689870,,,
1,2019-04-09T08:52:25Z,48.8425370,9.6688230,,,
1,2019-04-09T08:52:26Z,48.8425450,9.6686590,,,
1,2019-04-09T08:52:27Z,48.8425500,9.6684960,,,
1,2019-04-09T08:52:28Z,48.8425520,9.6683320,,,
1,2019-04-09T08:52:29Z,48.8425600,9.6681680,,,
1,2019-04-09T08:52:30Z,48.8425600,9.6680060,,,
1,2019-04-09T08:52:31Z,48.8425670,9.6678460,,,
1,2019-04-09T08:52:32Z,48.8425700,9.6676840,,,