I suspect it was the starter losing strength but still couldn't convince myself that was the case here. After a few researches on thefreshloaf.com, I came to two conclusion.
1) Overproofing - I think this is unlikely because I reduced time for both the bulk rise and the basket rise
2) Not enough tension - I think this is the culprit as I also reduced the number of stretch and fold.
Now, I am looking for a redemption. Hope to try again soon and will post the results.
|Leavening passed the float test|
|After the bulk rise|
|After the bench rest|
|1st loaf - disaster due to oven malfunction|
|Second loaf - rise but no ear|
|Finish loaf looks good|
|Poor oven spring - what a failure|