The phrase "a critical issue during" is correct and usable in written English.
It can be used when discussing an important problem or concern that occurred within a specific timeframe or event.
Example: "The team faced a critical issue during the project that required immediate attention to ensure its success."
Alternatives: "a significant problem during" or "an important concern during".
Most of all, however, critics say it was Modi himself who spawned the narrative of beef as a critical issue during elections last year by warning of a "pink revolution" (a widespread slaughter of cows) if his party didn't win.
Sand production is a critical issue during oil and gas production from sandstone reservoirs.
In addition, low solubility of decanoic acid in water could become a critical issue during this biotransformation process.
In the oil and gas industry, wellbore stability is considered to be a critical issue during well drilling and its subsequent completion.
In particular, achieving a good dispersion of the nanoparticles is a critical issue during the production of MMNCs, as the former have a high tendency to form clusters.
Part distortion is a critical issue during Additive Manufacturing (AM) of metallic parts since it prevents this technology from being implemented at industrial level.
But a critical issue worth examining during Ms. White's Senate nomination hearings will involve the S.E.C.'s practice of allowing companies to settle cases without admitting or denying any wrongdoing.
The contamination or deficiency of Selenium (Se) has become a critical issue in watershed systems worldwide during the past half-century, with either elevated or deficient Se concentrations in groundwater, surface water, soils, and associated vegetation.
The latter poses a critical issue as leg volume tends to increase during the day [ 3, 19].
As mentioned earlier, phenotypic change of the chondrocytes during culture is a critical issue in tissue engineering aiming to generate cartilage matrix by use of primary cultured chondrocytes [ 20, 21].
Control of the plasma-wall interaction during transient events will be a critical issue in ITER.
