The phrase "again bubbling" is correct and usable in written English.
It can be used to describe something that is bubbling once more, often in a literal sense like a liquid or in a metaphorical sense like emotions or ideas resurfacing.
Example: "After a long silence, the excitement in the room was again bubbling as new ideas were shared."
Alternatives: "bubbling once more" or "bubbling up again".
CONTROVERSY is once again bubbling up over the Elk Creek dam in Oregon.
It's having its hour again, bubbling up confusingly from Iran's witches brew.
By contrast Westmorland and Lonsdale, 80 minutes up the M6 from Manchester Central, which recorded 76.9% turnout in 2010 – England's highest – is again bubbling with campaign excitement.
These two groups have often clashed in the past, and as prices plummet the tensions are once again bubbling to the surface.
The market for Web stocks is once again bubbling, but a new self-proclaimed DIY fund disrupter is on the scene, Motif Investing of San Mateo, Calif.
In the kitchen a pot of chili again bubbled on his stove, only this time made from scratch by his wife, Martina, with garlic, onions and cumin.
That narrow and aging Notre Dame victory has again bubbled to the surface, like a fossil in a tar pit, as the Connecticut women are one game from tying U.C.L.A.'s major-college-basketball record.
The controversy over Salman Rushdie's The Satanic Verses, written more than two decades ago, has again bubbled to the surface after senior Muslim clerics in India demanded that the writer be prevented from entering the country to attend a literary festival.
Morris Brown's lingering financial problems again bubbled up to the surface in late 2000, when former students began complaining to state and federal education officials that Morris Brown was showing them as still registered -- preventing them from obtaining financial aid at other colleges and universities.
The Commission is also focusing on controlling the spread of hate speech on online platforms — an issue which has again bubbled to the fore in Europe in recent times, following the refugee crisis.
In the fourth eye, no air exited through the water bath until the serafin clamps were removed from the vortex veins, at which point air again bubbled profusely, as shown in the supplementary video.
